William h



(No Moa-e1.)

W. H.' BRWNE.

GRATB.

N0. 331,031. Pate N. PETRs Fhommhagmphm. washington. D. c.

NITED STATES PATENT rtree.

, GRATE.

SPECIFICATION forming part of Letters Patent No. 331,031, dated November24.-, 1885.

Application filed April 13, 1885. Serial No. 162,086. (No model.)

.T0 all whom it may concern,.-

Beit known that I, WILLIAM El. BRowNE,

of the city of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Gra-tes, of which thefollowing is a specification. lVIy invention refers to grates, and isadaptable to any or all kinds of coal or other solid materialcombustible burning-furnaces, boilers, heaters, open-grate fires,stoves, ranges, &c.

The object of this invention is to producea grate which shall embracejointly and severally the following advantages: first, to shake theentire surface of a bed of burning coals equally and to eliminate theashes and cinders with the minimum loss of heat-producing elements;second, to expose a uniform and maximum area of space comprisedby theinterstices of the grate-bars, whereby to pass such volumes of air asmay be necessary to producethe most complete combustion, third,simplicity and cheapness of construction; fourth, convenience forshaking and dumping.

In the drawings, Figure 1 is a top plan view of my improved grate. Fig.2 is a longitudinal section on line O. Fig. 3 is a longitudinal sectionon line A,with rocking bars in their extreme positions. Fig. 11 is anelevation of grate with connecting-rods removed.

Fig. 5 is a transverse section through frame at line P. Fig. 6 is adetached illustration of grate-bar connecting-rod, and Fig. 7 is a topplan view of grate as arranged for circular stoves or heaters.

The construction, disposition, and operation of the grate as a whole areas follows: First, the frame l is constructed of cast or wrought ironmetal, on which is formed, on the upper edges, 2 3, of the sides,aseries of square recesses, 4, alternating with half-round bearings 5.Into these bearings are simply placed a complement of intermeshingcrossbars or combs, the trunnions of which are formed to correspond tothe bearings in the side frame-that is,the bar 6 with round trunnion 7,the next bar, 8, with square trunnion 9, the next bar, 10, again withround bearings, and so on, be the number of the bars few or many. Itwill now be seen that those bars having square trunnions will be lockedand as if a part of the frame, while those bars with the round trunnionsare capable of being rotated. On the lower side,and preferably in thecenter,of all the bars tongues, as 11, are formed. Operating within thebearings 12 13, formed on the ends of the frame, is aconnecting rod oryoke, 14, having bearings 15, which only engage those tongues thatproject from the bars having round trunnions. By imparting reciprocatingmovement to the connecting-rod, as by the hand-lever 16 or handle 17,the alternate bars maybe vibrated with great force and rapidity. Theaction of the vibrating bars is limited by the bearings of theconnectingrod,whichimpinge againstthe tongues of the fixed bars. By thismode the cost of construction and assembling is reduced to a minimum,and any part may readily be replaced in the event of accidentalbreakage.

The vibrating motion imparted to the bars is that best calculated toengage, crush, and force through and out the residuals of combustion,the stationary bars being, as it were, the anvil andthe vibrating barsthe hammer, between which the ashes, cinder, and clinker must pass to beground and ejected.

The intersecting or intermeshing form of the side teeth or projectionsof the bars, as shown,develops a sinuous space,as 18, between each pairof the said bars. This space may be of any desired width; but in anycase it is evident that a much greater area is presented for the passageof air than by the forms of grates made heretofore. This furthermore,for obvious reasons, insures a more uniform agitation and cleansing ofthe dre-bed.

On the back extension of the grate, on the sides of the frame, are twosupportingtrunnions, 19 20, having their bearing in any proper part ofthe furnace. front of the grate, projecting preferably through thefurnace from the outside, are one or more plugs or latches, 21,whichengage the under side of the frame, and thus sustain it in position.Now, when desirable to dump the grate, it is simply required to withdrawthe latch or latches,when the grate will drop down at the front, asindicated by line 22, and thus ejects its load into theash-pit. Thegrate is Likewise, at the IOO then swung back into its normalposition,and the latch or latches or other analogous means arereinstated to retain the grate in place.

In order to retain the movable bars in po sition when the grate is notbeing raked, the connecting-bar 14 has a notch, 18, which, catching withone of the bearings 12, holds the barin position.

It will be evident that the bearing-frame and the intermeshingcross-bars of the grate may be ofany shape, forni, or dimensiondesirable without interfering with the principle and operation of thegrate as a whole.

No machine-work nor fitting of any kind is necessarily required in theconstruction of this grate, as all the parts may be fitted so loosely asto go togetherv in the exact form in which they are cast.

I do not limit myself to the precise form of connecting andbar-operating devices above described,as various devices may be employedfor rocking the movable bars; and it will be apparent that the swingingor pivoted frame may be used in connection with different arrangementsof rocking or raking bars and with different kinds of catches forholding it in a horizontal position.

I claim- 1. A raking-grate consisting of a frame, a series of removablebut stationary grate-bars supported` transversely in the frame, a seriesof intermediate grate-bars pivoted between the stationary grate-bars andprovided withv projections, and a bar mounted loosely in the frame andengaging said projections, substantially as set forth.

2. The frame carrying a series of removable fixed bars provided withteeth or projections on both sides, in combination with a series ofintermediate rocking bars provided with teeth extending between those ofthe fixed bars, projections on the under side of the rocking bars, a barengaging the projections, and a hand-lever connected to the bar,substantially as set forth. y j

3. The combination of a frame carrying a series of fixed transverse barshaving pendent tongues ll,and intermediate rocking bars having likependent tongues, and a connecting-rod provided with recesses receivingthe tongues of the rocking bars, substantially as described.

In testimony whereof I have signed my name to this specication in .thepresence of two subscribing witnesses.

WM. H. BROWN.

Witnesses:

FRED WILKINSON, Y CHAs. C. FIELD.

